
Here, \(\uparrow \)  and \(\downarrow \)  denote the transverse polarization states of proton. The function \(G(x,k_T,k^{\prime }_T)\)  is the factor simulating the final state interaction (in DIS) between the active antiquark and the spectator [1]}, [2]},
In this work we adopt the following form
\(\textrm {Im}\, G(x,k_T,k^{\prime }_T)=-\frac{C_F\alpha _s}{2\pi }\frac{1}{(k_T-k^{\prime }_T)^2},\) 
